[gcc r14-8541] gccrs: Add regression test for generic auto traits

[Arthur Cohen]

https://gcc.gnu.org/g:3e0e74f3e9cee9db52ef40ccacc4bc667a569455

commit r14-8541-g3e0e74f3e9cee9db52ef40ccacc4bc667a569455
Author: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>
Date:   Mon Nov 20 13:53:51 2023 +0100

    gccrs: Add regression test for generic auto traits
    
    Generics are forbidden on auto traits and an error should be emitted.
    This commit highlight this behavior.
    
    gcc/testsuite/ChangeLog:
    
            * rust/compile/generic_auto_trait.rs: New test.
    
    Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

Diff:
---
 gcc/testsuite/rust/compile/generic_auto_trait.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gcc/testsuite/rust/compile/generic_auto_trait.rs b/gcc/testsuite/rust/compile/generic_auto_trait.rs
new file mode 100644
index 000000000000..ae6a51d0244c
--- /dev/null
+++ b/gcc/testsuite/rust/compile/generic_auto_trait.rs
@@ -0,0 +1,2 @@
+auto trait IsCooler<G> {}
+// { dg-error "auto traits cannot have generic parameters .E0567." "" { target *-*-* } .-1 }